Know About Underground Water Tanks

Everything You Need To Know About Underground Water Tanks

Whether you live in rural or urban Australia, water shortage is a problem you must have encountered. Looking forward to water independence in the dry season? Solutions include installing a water tank. If large, above-ground water tanks come to mind first when contemplating water storage, you are not alone.

However, that may not be feasible for properties with minimal space, but the underground water tank is often the right solution in such cases. Knowing the benefits of underground water tanks for new homes could be a great start. This article provides insight into all you should know about underground water tanks. 

All To Know About Underground Water Tanks

An underground water tank is ideal for storing fresh drinking water in domestic homes and can be made of plastic or concrete. It offers a buffer plus a stop-gap between the low rain levels or high consumption periods. This means that activities like showering or flushing toilets will not affect your drinking supply. New homes with built-in underground water tanks use the supply for the laundry, garden, and bathrooms by using a submersible pump in the tank or an externally mounted pump. 

What Is An Underground Water Tank? 

It is a polyethylene tank manufactured in different sizes and shapes. They are installed entirely below ground level for optimum protection against various elements. 


  • Built onsite liner underground water tank.
  • Plastic underground water tank.
  • Concrete underground water tank.

It’s best to make your choice after evaluating their advantages and disadvantages. For starters, contemplate the storage you need and the amount of space the new purchase will require. A common choice among Australian homes is plastic storage. Generally speaking, they are easy to work with by being quick and easy to install. They are also affordable in the manufacturing stage.


Fortunately, different sizes make it easy to meet your project’s requirements. Still, finding a tank that will fit into your yard and not take up excess space is crucial. These tanks can store as little as 1500 litres to as much as 500000 litres or even more. But as expected, the larger the tank, the costlier it will be. The style of the tank chosen also influences the overall costs. 


As mentioned above, the cost will depend on the size. It will also be affected by the tank type and installation. For the installation, you can expect to part with anything between $3000 and $5000, inclusive of the excavation costs. Still, the exact price will be lower or higher based on your circumstances. Installing the tank during the construction period will lower your installation costs. A 3000-litre underground water tank can cost roughly $2300, while a 5000-litre underground water tank can cost about $3100. Installing beneath trafficable areas like the driveway requires riers and Class B lids. 

Underground water tank for detention purposes

Detention systems are becoming more common in the urban building environment. These tanks can also be used for detention purposes. It involves setting up the tanks with detention fittings to match the site plan and building needs. 

Which underground water tank brand is best?

Unlike most products, the quality of tanks is similar across brands with minimal differences. While all must meet the Australian Standards, some may exceed them. These tanks are designed to stand up to unfavourable underground conditions. As you select your water tank, consider the tank dimensions and if you’ll need to install the tank under a driveway, where it must hold up the extreme weight of vehicles. 


Want to install an underground water tank? Always opt for a reliable retailer with various choices in their catalogue. Remember that a high-quality installation and top-grade tank will provide long-lasting solutions to your water needs.

Read Also:
How To Maintain Your Underground Rainwater Tank

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